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Processing method for preparing bricks by utilizing urban domestic sludge

A technology for urban domestic sludge and urban domestic sewage, applied in applications, clay products, household appliances, etc., can solve the problems of life impact, land cannot be planted and used, waste of land resources, etc., and achieve the effect of saving resources

Inactive Publication Date: 2009-11-04
王明根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since various pollution sources in the sludge are heavy, long-term burial in the ground will cause greater pollution to the groundwater, and the land buried in the sludge cannot be planted and utilized, resulting in waste of land resources. big impact

Method used

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Embodiment Construction

[0013] The present invention is processed according to the following steps:

[0014] 1), granulate and dry the sludge produced in the urban domestic sewage treatment system until the water content is 25-30%, and then age;

[0015] 2), uniformly mix the aged granular material with shale or clay or cinder or pulverized construction waste according to the weight ratio of 1:3 to 4; after mixing, add water in the amount of brick making, and continue to stir and mix;

[0016] 3), blanking;

[0017] 4), sintering; put the brick into the tunnel kiln, and the tunnel kiln is provided with a preheating zone, a roasting zone, a heat preservation zone and a cooling zone, wherein the roasting zone temperature is 870 ℃~920 ℃, and the roasting time is 16~48 hours;

[0018] 5), heat preservation, cooling, obtained.

[0019] During roasting, in the case where the tail gas generated during the roasting process of sludge bricks contains more sulfur and chlorine components, the combined desulfur...

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Abstract

The invention discloses a processing method for preparing bricks by utilizing urban domestic sludge, which relates to the processing and the utilization of the urban domestic sludge. The processing method comprises the following steps: granulating and drying the sludge for aging; uniformly mixing aged granular materials with shale or clay or coal slag or building rubbish according to the proportion by weight; after the mixing, adding an amount of water for preparing brick blanks and continuing stirring and mixing; preparing the blanks; sintering the blanks; and preserving heat and cooling the blanks to obtain the bricks. The invention greatly saves resources and provides an active sludge processing and utilizing scheme. Some of the strength indexes of the prepared bricks even exceed those of the bricks prepared by ordinary processes. During roasting, for the condition that tail gas generated in the process of roasting the sludge bricks contain more sulfur and chlorine ingredients, a combined desulphurizing and deodorizing technology inside and outside a furnace is used, namely, the limestone is added in to a burning furnace, and water is sprayed to the tail gas under a sealing condition, thus a desulphurizing reactor does not need to be arranged on a tail part so as to ensure that smoke gas reaches an emission standard.

Description

technical field [0001] The invention relates to the treatment and utilization of urban domestic sewage, in particular to a method for making bricks with the sludge produced by combining with the urban domestic sewage treatment and processing line. Background technique [0002] With the increasing discharge of urban sewage, more and more sludge is deposited, and sludge treatment is very difficult. Most of the existing sludge treatment methods use deep burial treatment. Due to the heavy pollution sources in the sludge, long-term burial in the ground will cause greater pollution to the groundwater, and the land buried in the sludge cannot be planted and utilized, resulting in a waste of land resources. big impact. SUMMARY OF THE INVENTION [0003] Aiming at the problems of the prior art, the present invention provides a processing method for making bricks with urban domestic sludge, which is combined with an urban domestic sewage treatment processing line and uses the sludg...

Claims

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Application Information

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IPC IPC(8): C04B33/132
CPCY02P40/60
Inventor 方跃飞王明根田正祥徐道斌
Owner 王明根
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